hjfbluesky 2019-06-29
毛玻璃背景是一个很常见的网页样式,但大量实现方法都把问题复杂化了
现提供一个代码很直白且实现效果良好的实现方案,改良自W3Schools
<!DOCTYPE html> <html lang="en" dir="ltr"> <head> <meta charset="utf-8"> <title>FrostedGlass</title> <link rel="stylesheet" href="frostedGlass.css"> </head> <body> <div class="mainHolder"> <div class="textHolder"> <p>this is FrostedGlass</p> </div> </div> </body> </html>
.mainHolder是主框体
.textHolder是毛玻璃区域
.p是浮于毛玻璃上的文字内容
* { box-sizing: border-box; } .mainHolder { width: 600px; height: 600px; background-image: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/3/skyscrapers.jpg); background-attachment: fixed; background-position: center; background-size: cover; position: relative; } .textHolder { width: 100%; height: 200px; position: absolute; right: 0; bottom: 0; background: inherit; overflow: hidden; } .textHolder::before { content: ''; position: absolute; top:0; right: 0; bottom: 0; left: 0; background: inherit; background-attachment: fixed; filter: blur(4px); } .textHolder::after { content: ""; position: absolute; top:0; right: 0; bottom: 0; left: 0; background: rgba(0, 0, 0, 0.25); } p { z-index: 1; color: white; position: relative; margin: 0; }
解决毛玻璃效果里最核心的问题:模糊效果不能影响字体,采用了伪元素::after和::before
值得注意的是,在p标签里的position属性。设置为relative后,z-index会生效,将p从被遮挡状态“提起来”。
另外,对于不同的浏览器内核,filter的写法会有些许不同。